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108 lines
3.2 KiB
Haskell
108 lines
3.2 KiB
Haskell
module Main where
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import Data.Binary ( encode )
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import Data.Binary.Get
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import Data.Binary.Put
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import Data.Bits
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import Data.Word
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import System.Random
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import Bits
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import Test.QuickCheck
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main = do
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quickCheck prop_Word16be_with_offset
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quickCheck prop_Word16be_list
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quickCheck prop_SimpleCase
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quickCheck prop_Word32_from_2_Word16
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quickCheck prop_Word32_from_Word8_and_Word16
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prop_SimpleCase :: Word16 -> Property
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prop_SimpleCase w = w < 0x8000 ==>
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let p = RMap RBool $ \v -> case v of
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True -> RWord16be 15
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False -> RMapPure
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(RWord8 7 `RNextTo` RWord8 8)
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(\(msb:*:lsb)-> (fromIntegral msb `shiftL` 8) .|. fromIntegral lsb)
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w' = runGet (get p) lbs
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in w == w'
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where
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lbs = runPut (putWord16be w)
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prop_Word16be_with_offset :: Word16 -> Property
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prop_Word16be_with_offset w = w < 0x8000 ==>
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let b :*: w' :*: w'' = runGet (get (RCheck RBool not "fail" `RNextTo` RWord16be 15 `RNextTo` RWord16be 16)) lbs
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in w == w' && w == w''
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where
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lbs = runPut (putWord16be w >> putWord16be w)
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prop_Word16be_list :: Word8 -> [Word16] -> Property
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prop_Word16be_list w ws = property $
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let p = RWord8 8 `RNextTo` RList (length ws) (RWord16be 16) :: R (T Word8 [Word16])
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w' :*: ws' = runGet (get p) lbs :: T Word8 [Word16]
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in ws == ws' && w == w'
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where
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lbs = runPut (putWord8 w >> mapM_ putWord16be ws)
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prop_Word32_from_Word8_and_Word16 :: Word8 -> Word16 -> Property
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prop_Word32_from_Word8_and_Word16 w8 w16 = property $
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let p = RWord32be 24
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w' = runGet (get p) lbs
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in w0 == w'
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where
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lbs = runPut (putWord8 w8 >> putWord16be w16)
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w0 = ((fromIntegral w8) `shiftL` 16) .|. fromIntegral w16
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prop_Word32_from_2_Word16 :: Word16 -> Word16 -> Property
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prop_Word32_from_2_Word16 w1 w2 = property $
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let p = RWord32be 32
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w' = runGet (get p) lbs
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in w0 == w'
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where
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lbs = encode w0
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w0 = ((fromIntegral w1) `shiftL` 16) .|. fromIntegral w2
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instance Arbitrary Word8 where
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arbitrary = choose (minBound, maxBound)
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shrink 0 = []
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shrink n = [ n - 1 ]
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instance Arbitrary Word16 where
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arbitrary = choose (minBound, maxBound)
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shrink 0 = []
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shrink n = [ n - 1000, n - 100, n - 10, n - 1 ]
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instance Arbitrary Word32 where
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arbitrary = choose (minBound, maxBound)
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instance Arbitrary Word64 where
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arbitrary = choose (minBound, maxBound)
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integralRandomR :: (Integral a, RandomGen g) => (a,a) -> g -> (a,g)
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integralRandomR (a,b) g = case randomR (fromIntegral a :: Integer,
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fromIntegral b :: Integer) g of
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(x,g) -> (fromIntegral x, g)
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instance Random Word where
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randomR = integralRandomR
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random = randomR (minBound,maxBound)
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instance Random Word8 where
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randomR = integralRandomR
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random = randomR (minBound,maxBound)
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instance Random Word16 where
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randomR = integralRandomR
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random = randomR (minBound,maxBound)
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instance Random Word32 where
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randomR = integralRandomR
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random = randomR (minBound,maxBound)
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instance Random Word64 where
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randomR = integralRandomR
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random = randomR (minBound,maxBound)
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